diff --git a/go/ql/lib/ext/github.com.valyala.fasthttp.model.yml b/go/ql/lib/ext/github.com.valyala.fasthttp.model.yml
index 9585ca22401..b18b80882a5 100644
--- a/go/ql/lib/ext/github.com.valyala.fasthttp.model.yml
+++ b/go/ql/lib/ext/github.com.valyala.fasthttp.model.yml
@@ -25,3 +25,15 @@ extensions:
       - ["github.com/valyala/fasthttp", "URI", True, "PathOriginal", "", "", "ReturnValue[0]", "remote", "manual"]
       - ["github.com/valyala/fasthttp", "URI", True, "QueryString", "", "", "ReturnValue[0]", "remote", "manual"]
       - ["github.com/valyala/fasthttp", "URI", True, "String", "", "", "ReturnValue[0]", "remote", "manual"]
+      - ["github.com/valyala/fasthttp", "Request", True, "Body", "", "", "ReturnValue[0]", "request", "manual"]
+      - ["github.com/valyala/fasthttp", "Request", True, "BodyGunzip", "", "", "ReturnValue[0]", "request", "manual"]
+      - ["github.com/valyala/fasthttp", "Request", True, "BodyInflate", "", "", "ReturnValue[0]", "request", "manual"]
+      - ["github.com/valyala/fasthttp", "Request", True, "BodyStream", "", "", "ReturnValue[0]", "request", "manual"]
+      - ["github.com/valyala/fasthttp", "Request", True, "BodyUnbrotli", "", "", "ReturnValue[0]", "request", "manual"]
+      - ["github.com/valyala/fasthttp", "Request", True, "BodyUncompressed", "", "", "ReturnValue[0]", "request", "manual"]
+      - ["github.com/valyala/fasthttp", "Request", True, "ContinueReadBody", "", "", "Argument[0]", "request", "manual"]
+      - ["github.com/valyala/fasthttp", "Request", True, "ContinueReadBodyStream", "", "", "Argument[0]", "request", "manual"]
+      - ["github.com/valyala/fasthttp", "Request", True, "Host", "", "", "ReturnValue[0]", "request", "manual"]
+      - ["github.com/valyala/fasthttp", "Request", True, "ReadBody", "", "", "Argument[0]", "request", "manual"]
+      - ["github.com/valyala/fasthttp", "Request", True, "ReadLimitBody", "", "", "Argument[0]", "request", "manual"]
+      - ["github.com/valyala/fasthttp", "Request", True, "RequestURI", "", "", "ReturnValue[0]", "request", "manual"]
diff --git a/go/ql/lib/semmle/go/frameworks/Fasthttp.qll b/go/ql/lib/semmle/go/frameworks/Fasthttp.qll
index 247a6f4fe91..cf4803e1dbe 100644
--- a/go/ql/lib/semmle/go/frameworks/Fasthttp.qll
+++ b/go/ql/lib/semmle/go/frameworks/Fasthttp.qll
@@ -405,14 +405,16 @@ module Fasthttp {
    */
   module Request {
     /**
-     * DEPRECATED: Use `RemoteFlowSource` instead.
+     * DEPRECATED: Use `RemoteFlowSource::range` instead.
      */
     deprecated class UntrustedFlowSource = RemoteFlowSource;
 
     /**
+     * DEPRECATED: Use `RemoteFlowSource::range` instead.
+     *
      * The methods as Remote user controllable source which can be many part of request.
      */
-    class RemoteFlowSource extends RemoteFlowSource::Range instanceof DataFlow::Node {
+    deprecated class RemoteFlowSource extends RemoteFlowSource::Range instanceof DataFlow::Node {
       RemoteFlowSource() {
         exists(Method m |
           m.hasQualifiedName(packagePath(), "Request",